assembly/dis-assembly instructions for O-4-2 Porter and 2-truck shay

[old pilot]

Good morning all,

I've been running these two engines for a while so its time to lube/oil and perhaps weather a little. I have the parts diagrams included with the engines but would like an almost step-by-step instruction sheet so I don't do something wrong and ruin good running engines. Any help/suggestions will be appreciated.

If you haven't guessed from my other posts, I'm not too mechanically inclined. My handle says I busted the aircraft and had a crew chief to fix it.

Happy holidays.

Old pilot